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Date: Mon, 28 Jul 2003 11:40:41 -0700
From: Andrew Morton <akpm@osdl.org>
To: Valdis.Kletnieks@vt.edu
Cc: kernel@kolivas.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] O10int for interactivity
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Valdis.Kletnieks@vt.edu wrote:
>
> I am, however, able to get 'xmms' to skip.  The reason is that the CPU is being
>  scheduled quite adequately, but I/O is *NOT*.
> 
> ...
>  I'm guessing that the anticipatory scheduler is the culprit here.  Soon as I figure
>  out the incantations to use the deadline scheduler, I'll report back....

Try decreasing the expiry times in /sys/block/hda/queue/iosched:

read_batch_expire
read_expire
write_batch_expire
write_expire